If you look at the link to the instructions , it says there it must be installed to the IEE regs, if you also quote the relevant IEE reg 601-06-01, it will confirm that it does not conform
Thanks alot as well, WooHoo i'm gonna get technical with them I'll post back when ive spoke to them, dont know how long it will take them to sort it out as they left me with no hot water for 6 months when i reported my old water heater breaking, if they try to mess me about again i'll get onto citizen advice, Thanks again